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Finding the Fourth Proportional to 789.07, 1,088.89 and 494.50

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Solution

The fourth proportional to 789.07, 1,088.89 and 494.50 is: 682.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.07 : 1,088.89 = 494.50 : x
  2. Step 2: Convert to fraction form
    789.07/1,088.89 = 494.50/x
  3. Step 3: Cross multiply
    789.07x = 1,088.89 × 494.50
  4. Step 4: Simplify right side
    789.07x = 538,456.11
  5. Step 5: Solve for x
    x = 538,456.11/789.07
  6. Step 6: Final answer
    x = 682.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.